jiangxt2 commented on PR #58117:
URL: https://github.com/apache/spark/pull/58117#issuecomment-5352619824

   Additional ecosystem context:
   
   [Apache 
Doris](https://doris.apache.org/docs/3.x/sql-manual/sql-functions/scalar-functions/bitmap-functions/bitmap-contains/)
 and 
[StarRocks](https://docs.starrocks.io/docs/sql-reference/sql-functions/bitmap-functions/bitmap_contains/)
 expose `bitmap_contains`, while 
[ClickHouse](https://clickhouse.com/docs/reference/functions/regular-functions/bitmap-functions)
 exposes `bitmapContains`. This comparison supports the API naming and the 
value of a native membership predicate only; it does not imply binary-format or 
semantic compatibility. Those engines use native bitmap representations, while 
this PR keeps Spark's existing flat `BINARY` bitmap representation and 
bucket-local position mapping.


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